:root {
    --bg-dark: #1a1a1a;
    --bg-panel: #252525;
    --bg-input: #333333;
    --text-main: #ffffff;
    --text-muted: #aaaaaa;
    --accent-color: #4a9eff;
    --accent-hover: #3b7ecc;
    --danger-color: #ff4a4a;
    --success-color: #00ff00;
    /* Chroma Key Green */
    --border-color: #444444;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* --- Control Panel --- */
.control-panel {
    width: 350px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
}

.panel-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-sm {
    padding: 4px 8px;
    font-size: 0.9rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
}

.btn-sm:hover {
    background-color: #444;
    color: white;
}

.panel-header h1 {
    font-size: 1.2rem;
    font-weight: 700;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--danger-color);
    box-shadow: 0 0 5px var(--danger-color);
    transition: all 0.3s ease;
}

.status-indicator.connected {
    background-color: var(--success-color);
    box-shadow: 0 0 5px var(--success-color);
}

.settings-container {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

/* Accordion */
.accordion-item {
    margin-bottom: 10px;
    background-color: var(--bg-input);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-header {
    padding: 12px 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    user-select: none;
    transition: background-color 0.2s;
}

.accordion-header:hover {
    background-color: #3d3d3d;
}

.accordion-content {
    padding: 15px;
    display: none;
    border-top: 1px solid var(--border-color);
}

.accordion-item.active .accordion-content {
    display: block;
}

.accordion-item.active .icon {
    transform: rotate(180deg);
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

textarea,
select,
input[type="text"] {
    width: 100%;
    padding: 8px;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-main);
    font-family: inherit;
    resize: vertical;
}

/* Button Group */
.btn-group {
    display: flex;
    gap: 5px;
}

.btn {
    flex: 1;
    padding: 8px;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* Keyword Chips */
.keyword-chips-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}

.keyword-chip {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 4px 10px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.keyword-chip:hover {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.keyword-chip.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn-xs {
    padding: 2px 6px;
    font-size: 0.8rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
}

.btn-xs:hover {
    color: white;
}

/* Panel Footer */
.panel-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-panel);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.preview-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

#duration-select {
    width: auto;
    flex-shrink: 0;
}

/* Header Controls */
.header-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-play-red {
    background-color: #ff4757;
    color: white;
    border: none;
    padding: 10px 24px;
    font-size: 1.1rem;
    font-weight: 800;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(255, 71, 87, 0.4);
    transition: all 0.2s;
    flex: 1;
    justify-content: center;
}

.btn-play-red:hover {
    background-color: #ff6b81;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 71, 87, 0.6);
}

.btn-play-red:active {
    transform: translateY(0);
}

.btn-save {
    background-color: var(--bg-input);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    justify-content: center;
}

.btn-save:hover {
    background-color: var(--bg-hover);
    border-color: var(--text-muted);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.hidden {
    display: none !important;
}

/* --- Preview Area --- */
.preview-area {
    flex: 1;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.preview-container {
    width: 100%;
    height: 100%;
    background-color: var(--success-color);
    /* Chroma Key Green */
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column-reverse;
    /* Chat flows upwards */
    padding: 20px;
}

.chat-fade-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 150px;
    background: linear-gradient(to bottom, var(--success-color) 0%, transparent 100%);
    z-index: 5;
    pointer-events: none;
}

.chat-feed {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding-bottom: 20px;
}

/* Chat Bubbles */
.chat-message {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    animation: slideIn 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    padding: 0 10px;
}

.profile-pic {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    /* Circle */
    background-color: #ddd;
    flex-shrink: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: #333;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    background-size: cover;
    background-position: center;
}

.message-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 85%;
}

.nickname-badge {
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 4px;
    display: inline-block;
}

.message-bubble {
    background-color: rgba(30, 30, 30, 0.9);
    color: white;
    padding: 10px 16px;
    border-radius: 18px;
    border-top-left-radius: 4px;
    /* Slightly rounded corner */
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 1.05rem;
    line-height: 1.5;
    word-break: break-word;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 20;
    color: white;
    font-weight: bold;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Event Overlay */
.event-overlay {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    width: 80%;
    max-width: 500px;
    animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.event-banner {
    background: linear-gradient(90deg, #ff9a9e 0%, #fecfef 99%, #fecfef 100%);
    padding: 15px 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    color: #333;
    font-weight: bold;
}

.event-icon {
    font-size: 1.5rem;
}

/* 초기화 버튼 직관화 */
.btn-reset-full {
    background-color: var(--bg-input);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: 0.2s;
}

.btn-reset-full:hover {
    background-color: var(--danger-color);
    color: white;
}

/* 히스토리 버튼 */
.btn-history {
    background-color: #444;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 30px;
    cursor: pointer;
    margin-top: 5px;
    font-weight: 600;
}

/* 히스토리 모달 */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
    display: flex; justify-content: center; align-items: center;
}

.modal-content {
    background: var(--bg-panel);
    width: 80%; max-width: 600px; height: 70%;
    border-radius: var(--radius-lg);
    display: flex; flex-direction: column;
    overflow: hidden;
}

.modal-header {
    padding: 20px; border-bottom: 1px solid var(--border-color);
    display: flex; justify-content: space-between; align-items: center;
}

.history-list {
    flex: 1; padding: 20px; overflow-y: auto;
    display: flex; flex-direction: column; gap: 10px;
}

.history-item {
    padding: 10px; background: var(--bg-input); border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.history-item b { color: var(--accent-color); margin-right: 10px; }

.btn-close { background: none; border: none; color: white; font-size: 2rem; cursor: pointer; }

@keyframes popIn {
    from {
        opacity: 0;
        transform: translate(-50%, 20px) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translate(-50%, 0) scale(1);
    }
}